augmented reality applications overlap virtual objects over a real scene considering the context.... more augmented reality applications overlap virtual objects over a real scene considering the context. Today, more advanced applications also make use of diminished reality, which removes real objects from a scene. This paper describes a novel approach that combines augmented reality and diminished reality techniques to modify real objects in augmented reality applications. The proposed approach removes an object and replaces it with its purposely-modified replica. The solution uses dynamic texture techniques and inpaint to enhance the visual response of the performed modification. The results are promising considering both realism of the modified real object and performance of the application.
A novel biosensor for hydrogen peroxide was developed by combining the known properties of microp... more A novel biosensor for hydrogen peroxide was developed by combining the known properties of microperoxidase-11 (MP11) as an oxidation catalyst, and the interesting properties of diphenylalanine peptide nanotubes (PNTs) as a supporting matrix to allow a good bioelectrochemical interface. In this case, the synthesized MP11/PNTs were immobilized onto the ITO electrode surface via layer-by-layer (LBL) deposition, using poly(allylamine hydrochloride) (PAH) as positively charged polyelectrolyte layers. The PNTs provide a favorable microenvironment for MP11 to perform direct electron transfer to the electrode surface. The resulting electrodes showed a pair of well-defined redox peaks with formal potential at about −343 mV (versus SCE) in phosphate buffer solution (pH 7). The experimental results also demonstrated that the resulting biosensor exhibited good electrocatalytic activity to the reduction of H2O2 with a sensitivity of 9.43 μA cm−2 mmol−1 L, and a detection limit of 6 μmol L−1 at the signal-to-noise ratio of 3. Moreover, we also observed that the peptides self-assembly can be influenced upon changing the pH of the solution. Alkaline solution appears to favor the packing of diphenylalanine nanotubes being closer than acidic or neutral conditions. The study proved that the combination of PNTs with MP11 is able to open new opportunities for the design of enzymatic biosensors with potential applications in practice.
augmented reality applications overlap virtual objects over a real scene considering the context.... more augmented reality applications overlap virtual objects over a real scene considering the context. Today, more advanced applications also make use of diminished reality, which removes real objects from a scene. This paper describes a novel approach that combines augmented reality and diminished reality techniques to modify real objects in augmented reality applications. The proposed approach removes an object and replaces it with its purposely-modified replica. The solution uses dynamic texture techniques and inpaint to enhance the visual response of the performed modification. The results are promising considering both realism of the modified real object and performance of the application.
A novel biosensor for hydrogen peroxide was developed by combining the known properties of microp... more A novel biosensor for hydrogen peroxide was developed by combining the known properties of microperoxidase-11 (MP11) as an oxidation catalyst, and the interesting properties of diphenylalanine peptide nanotubes (PNTs) as a supporting matrix to allow a good bioelectrochemical interface. In this case, the synthesized MP11/PNTs were immobilized onto the ITO electrode surface via layer-by-layer (LBL) deposition, using poly(allylamine hydrochloride) (PAH) as positively charged polyelectrolyte layers. The PNTs provide a favorable microenvironment for MP11 to perform direct electron transfer to the electrode surface. The resulting electrodes showed a pair of well-defined redox peaks with formal potential at about −343 mV (versus SCE) in phosphate buffer solution (pH 7). The experimental results also demonstrated that the resulting biosensor exhibited good electrocatalytic activity to the reduction of H2O2 with a sensitivity of 9.43 μA cm−2 mmol−1 L, and a detection limit of 6 μmol L−1 at the signal-to-noise ratio of 3. Moreover, we also observed that the peptides self-assembly can be influenced upon changing the pH of the solution. Alkaline solution appears to favor the packing of diphenylalanine nanotubes being closer than acidic or neutral conditions. The study proved that the combination of PNTs with MP11 is able to open new opportunities for the design of enzymatic biosensors with potential applications in practice.
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Papers by Wendel Lima